The head is plastic and the screw itself is metal.
Are you looking for knobs? Grayish in color. If this is what they're looking for the part number is True #802299. These hold the shelves. We do not have the knobs on our site but we can special order them for you if you contact our sales team at 1.888.388.6372.
Thanks for your interest in eTundra.com. This item is a shelf clip that screws in place. It does not rotate. Thank you.
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